build(deps): bump serialize-javascript and terser-webpack-plugin in /js

Removes [serialize-javascript](https://github.com/yahoo/serialize-javascript). It's no longer used after updating ancestor dependency [terser-webpack-plugin](https://github.com/webpack/minimizer-webpack-plugin). These dependencies need to be updated together.


Removes `serialize-javascript`

Updates `terser-webpack-plugin` from 5.3.16 to 5.6.0
- [Release notes](https://github.com/webpack/minimizer-webpack-plugin/releases)
- [Changelog](https://github.com/webpack/minimizer-webpack-plugin/blob/main/CHANGELOG.md)
- [Commits](webpack/minimizer-webpack-plugin@v5.3.16...v5.6.0)

---
updated-dependencies:
- dependency-name: serialize-javascript
  dependency-version:
  dependency-type: indirect
- dependency-name: terser-webpack-plugin
  dependency-version: 5.6.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

js/package-lock.json

@@ -4,7 +4,7 @@
         "@babel/core": "^7.7.7",
         "babel-preset-env": "^1.7.0",
         "license-loader": "^0.7.0",
-        "terser-webpack-plugin": "^5.3.6",
+        "terser-webpack-plugin": "^5.6.0",
         "ts-loader": "^9.4.2",
         "typescript": "^3.7.3",
         "webpack": "^5.105.2",